Well I find it humorous that we will put thousands into an RC fleet (or even just one!) and scrimp on a PS..... Hobby Lobby sells a 30 amp for $80, and a 40 amp for $100, both of which output 13.8V, not 12. I say get one of these and be done with it...
CRAP... apparently they are not selling them anymore- wtf they still carry the 20 amp tho. Shoulda checked before I posted, sorry. Do a search for PowerForce power supply- someone must still have them. (MaxAmps does, but they are OVERPRICED)
I use a 0-20V, 0-10Amp programmable power supply actively charging a 12 lead acid starter batt running a 720i charger, I just set the voltage at 12v and 40 amps. I get full 250watts from the charger, can charge a 4200 6s pack at 10 amps.
I bought a Chargery power PS (250watt), but I have problems with the 720i shutting down or rebooting from power hiccups when charging over 200watts.
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens
A good quality, high output power supply won't be cheap. The cheap ones are just like other cheap electronics: way over-rated and built from low tolerance components.
You just spent $300 on a nice charger. Don't take a risk on a cheap-o power supply that's going brown-out, give "dirty" power, and possibly overload and ruin the charger.
Last edited by simplechamp; 08.01.2009 at 09:36 PM.